<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            background-color: #ccc;
        }
        
        div {
            font-size: 100px;
            text-align: center;
            color: #ccc;
        }
        
        div:nth-child(1) {
            text-shadow: 1px 1px 1px #000, -1px -1px 1px #fff;
        }
        
        div:nth-child(2) {
            text-shadow: 1px 1px 1px #fff, -1px -1px 1px #000;
        }
    </style>
</head>

<body>
    <div>中职通有线下课程</div>
    <div>中职通有线下课程</div>
    <div>中职通有线下课程</div>
</body>

</html>